What goes in should be proven to help. Natural doesn t mean safe. The most poisonous chemicals are natural. The only proven treatments for someone with carotid disease are to seek control of blood pressure, lower cholesterol and possibly a baby aspirin every day. The extract that you take is actually the drug lovastatin in an impure form. The natural way of lowering cholesterol is effective but requires strict adherence to a diet similar to that popularized by Dean Ornish.